Western Digital WD43PURZ – 4TB 5400 RPM SATA 6Gb/s 3.5-Inch Surveillance Hard Drive (WD Purple Series)
The WD43PURZ is a 4TB 3.5-inch surveillance-class hard drive from Western Digital’s WD Purple line, designed for continuous 24/7 operation in DVR and NVR video recording systems. It suits system integrators and security resellers building multi-camera CCTV installations, with support for up to 64 HD cameras writing simultaneously. As a 5400 RPM (IntelliPower) drive with SATA 6 Gb/s, it prioritizes sustained sequential write performance and low heat over the random IOPS of an SSD — the right trade-off for video workloads.
Key specifications (table)
| Parameter | Specification |
|---|---|
| Model | WD43PURZ |
| Series | WD Purple (surveillance class) |
| Capacity | 4 TB |
| Interface | SATA 6 Gb/s |
| Form Factor | 3.5-inch |
| Spindle Speed | 5400 RPM (IntelliPower; speed profile managed by WD) |
| Cache | 64 MB |
| Workload Rate Limit | Up to 180 TB/year (surveillance-optimized; higher than typical desktop drives) |
| Recording Technology | AllFrame™ for enhanced video streaming and recording (reduces frame loss) |
| MTBF | 1 million hours |
| Operating Temperature | 0°C to 65°C |
| Camera Support | Up to 64 HD cameras simultaneously |
Good to know
- Confirm that your NVR/DVR chassis, power supply, and SATA controller support 3.5-inch SATA drives and provide adequate cooling — the 0°C to 65°C operating range suits enclosed surveillance enclosures, but sustained ambient heat shortens drive life in any enclosure.
- Within WD’s lineup, Purple targets 24/7 video surveillance (versus Red for NAS, Blue for desktop, and Ultrastar/enterprise tiers for data-center workloads); the 180 TB/year workload rating reflects that surveillance duty cycle rather than enterprise transactional use.
- For multi-bay NVR builds, plan retention needs before ordering — 4TB fills quickly with 64 HD cameras, and mixing drive capacities across bays can complicate RAID or recording allocation; buy identical units from the same batch for uniform performance.
For tray and reel pricing, current stock by part number and date code, and volume discounts on bulk orders, request a bulk quotation.
The WD43PURZ is a 4TB 3.5-inch surveillance-class hard drive from Western Digital’s WD Purple line, designed for continuous 24/7 operation in DVR and NVR video recording systems. It suits system integrators and security resellers building multi-camera CCTV installations, with support for up to 64 HD cameras writing simultaneously. As a 5400 RPM (IntelliPower) drive with SATA 6 Gb/s, it prioritizes sustained sequential write performance and low heat over the random IOPS of an SSD — the right trade-off for video workloads.
Key specifications (table)
| Parameter | Specification |
|---|---|
| Model | WD43PURZ |
| Series | WD Purple (surveillance class) |
| Capacity | 4 TB |
| Interface | SATA 6 Gb/s |
| Form Factor | 3.5-inch |
| Spindle Speed | 5400 RPM (IntelliPower; speed profile managed by WD) |
| Cache | 64 MB |
| Workload Rate Limit | Up to 180 TB/year (surveillance-optimized; higher than typical desktop drives) |
| Recording Technology | AllFrame™ for enhanced video streaming and recording (reduces frame loss) |
| MTBF | 1 million hours |
| Operating Temperature | 0°C to 65°C |
| Camera Support | Up to 64 HD cameras simultaneously |
Good to know
- Confirm that your NVR/DVR chassis, power supply, and SATA controller support 3.5-inch SATA drives and provide adequate cooling — the 0°C to 65°C operating range suits enclosed surveillance enclosures, but sustained ambient heat shortens drive life in any enclosure.
- Within WD’s lineup, Purple targets 24/7 video surveillance (versus Red for NAS, Blue for desktop, and Ultrastar/enterprise tiers for data-center workloads); the 180 TB/year workload rating reflects that surveillance duty cycle rather than enterprise transactional use.
- For multi-bay NVR builds, plan retention needs before ordering — 4TB fills quickly with 64 HD cameras, and mixing drive capacities across bays can complicate RAID or recording allocation; buy identical units from the same batch for uniform performance.
For tray and reel pricing, current stock by part number and date code, and volume discounts on bulk orders, request a bulk quotation.
